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Costas
- 介绍了某直接序列扩频、QPSK调制系统接收通道中四相Costas 载波跟踪环的原理及其基于 DSP+FPGA 的实现-Introduced a direct-sequence spread spectrum, QPSK modulation system, receive path Costas carrier tracking loop four-phase principle and its implementation based on DSP+ FPGA
QPSK
- qpsk调制的vhdl程序 扩频 加扰 解扩 解扰-the qpsk vhdl program spread spectrum modulation scrambling despreading descrambling
QPSK_DSSS
- 该程序使用verilog语言，编写了QPSK-DSSS系统的发端，主要模块包括对同相分量和正交分量的扩频，通过根升余弦滤波器，以及与载波相乘等模块。-The program uses the verilog language, written QPSK-DSSS system, the originator, the main modules include in-phase and quadrature components of the spectrum, through the root
dsp-a-rendre-rabah-walid
- qpsk modulation with dsp + spectrum analyser
modelsim
- 一款用于扩频通信发射系统的CPLD程序，基本的QPSK调制-A used in spread spectrum communication system of CPLD program, basic QPSK modulation